====== OSA : OS_Bsem_Check ======
<color blue>**[[en:osa:ref:description:data_types#OST_WORD|OST_WORD]] OS_Bsem_Check (bsem)**</color>\\ 
<color blue>**[[en:osa:ref:description:data_types#OST_WORD|OST_WORD]] bool OS_Bsem_Check_I (bsem)**</color>\\ 
=== ===


Check if binary semaphore is set. Returns value of type [[en:osa:ref:description:data_types#OST_WORD|OST_WORD]].

=== Call allowed: ===
Everywhere


=== Parameters: ===
{| class = "fpl"
|-
|//''bsem''//
|Binary semaphore's ID. Number of binary semaphores is set by ##[[en:osa:ref:appendix:configuration#Data contents|OS_BSEMS]]## constant in ##[[en:osa:ref:appendix:configuration|OSAcfg.h]]##
|}


=== Returns: ===
{| class = "fpl"
|-
|//''==0''//
| Semaphore is not set
|-
|//''!=0''//
| Semaphore is set
|}


=== Example: ===
<code cpp>
#define BS_DATA_RECEIVED  3

void Task (void)
{
    for (;;) {
        /*...*/
        // Is semaphore set by other task?
        if (OS_Bsem_Check(BS_DATA_RECEIVED)) {
            // Work with received data
            /*...*/
        }
        /*...*/
    }
}
</code>


=== Old style name ===
<color gray>**OS_CheckBSem**</color>\\ 







=== See also ===
  * [[en:osa:ref:allservices:OS_Bsem_Set|OS_Bsem_Set]]
  * [[en:osa:ref:allservices:OS_Bsem_Reset|OS_Bsem_Reset]]
  * [[en:osa:ref:allservices:OS_Bsem_Switch|OS_Bsem_Switch]]

  * [[en:osa:ref:allservices:OS_Bsem_Wait|OS_Bsem_Wait]]
  * [[en:osa:ref:allservices:OS_Bsem_Wait_TO|OS_Bsem_Wait_TO]]

----
  * [[en:osa:ref:services:alphabetical|Alphabetical]]
  * [[en:osa:ref:services:brieflist|All services]]
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